Motorola PowerQUICC II MPC8280 Series Reference Manual page 1228

Freescale Semiconductor, Inc.
IMA Microcode Architecture
34.3.3.1 Cell Reception Task
In the cell reception task, received ICP cells in which an SCCI change is noted, except for
the first ICP received cell, are passed to a user-defined receive AAL0 channel to be
processed by software. These received cells (and other event indications) are used by the
software to initialize IMA links and groups, and to manage transitions between link and
group states.
The cell reception task centers around a four-state link state machine. Microcode tasks are
performed within each state, but transitions between states are managed by software. The
processing of received cells (both ICP cells and data cells) is determined by the state of the
link.
34-18 MPC8280 PowerQUICC II Family Reference Manual MOTOROLA
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